content: /*
   * Copyright (C) 2015-present, Ant Financial Services Group
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * 	http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alipay.hulu.ui;
  
  import android.content.Context;
  import android.util.AttributeSet;
  import android.view.View;
  import android.widget.RadioGroup;
  
  /**
   * 流式布局的RadioGroup<br/>
   * Use code from <a href="https://blog.csdn.net/hknock/article/details/8603533">android定义组件自动换行</a>
   */
  public class FlowRadioGroup extends RadioGroup {
      public FlowRadioGroup(Context context) {
          super(context);
      }
  
      public FlowRadioGroup(Context context, AttributeSet attrs) {
          super(context, attrs);
      }
  
      @Override
      protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
          int maxWidth = MeasureSpec.getSize(widthMeasureSpec);
          int childCount = getChildCount();
          int x = 0;
          int y = 0;
          int row = 0;
          for (int index = 0; index < childCount; index++) {
              final View child = getChildAt(index);
              if (child.getVisibility() != View.GONE) {
                  child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
                  // 此处增加onlayout中的换行判断，用于计算所需的高度
                  int width = child.getMeasuredWidth();
                  int height = child.getMeasuredHeight();
                  x += width;
                  y = row * height + height;
                  if (x > maxWidth) {
                      x = width;
                      row++;
                      y = row * height + height;
                  }
              }
          }
          // 设置容器所需的宽度和高度
          setMeasuredDimension(maxWidth, y);
      }
  
      @Override
      protected void onLayout(boolean changed, int l, int t, int r, int b) {
          final int childCount = getChildCount();
          int maxWidth = r - l;
          int x = 0;
          int y = 0;
          int row = 0;
          for (int i = 0; i < childCount; i++) {
              final View child = this.getChildAt(i);
              if (child.getVisibility() != View.GONE) {
                  int width = child.getMeasuredWidth();
                  int height = child.getMeasuredHeight();
                  x += width;
                  y = row * height + height;
                  if (x > maxWidth) {
                      x = width;
                      row++;
                      y = row * height + height;
                  }
                  child.layout(x - width, y - height, x, y);
              }
          }
      }
  }